CT — Conducte auditive interne și oase temporale (MCB)
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MCB Radiology — 10 IACs
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Documentul original MCB — Conducte auditive interne și oase temporale
Protocol · 4 pagini · consultat la 2026-09-27.
Descarcă PDF-ul integral · Sursa MCB · Catalogul MCB pentru această modalitate
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Textul documentului original
Pagina 1 — text în engleză
Updated 09/10/24 CT IACs (Temporal Bones / Mastoids) Reviewed 05/14/25 Indications - trauma, mass, hearing loss, cholesteatoma, tinnitus, vertigo, infection, otitis, mastoiditis. GENERAL SCAN NOTES Remove any metal from the imaging field of view (particularly from the ears). Topogram - from just above sella turcica to just below hard palate. Craniocaudal coverage - from just above sella turcica to just below hard palate (see diagram below). For all temporal bone studies, it is very important for image quality purposes to position the patient in the center of the scan field. Use the lateral laser beam to make sure that the patient is positioned in the center. IV Contrast: 100 mL Omnipaque-300, inject at 2.5 mL/sec, 40 secs scan delay. For GE scanners, it is essential for the 1st recon thickness on the scanner to match the 1st recon thickness in this protocol book for the prescribed Noise Index to be valid. The 1st recon should generally be the thickest recon in the protocol. Axial Coverage Axial Full FOV Coronal Right Coverage Coronal Left Coverage FOV for axial and coronal right and left recons must be 80-120 mm and centered on their respective IACS.
Pagina 2 — text în engleză
CT IACs (Temporal Bones / Mastoids) SIEMENS PARAMETERS & RECONS Scan
Care
Scan
Mode kV mAs Care
Dose kV & Lvl Pitch Acq Coll Rot Time Time Sensation 16 spiral 120 120 on NA 0.55 16 0.75 1.0 6.1 Go Up 32 spiral on 110 0.55 32 0.7 Sn 130 316 on 1.0 3.2 Sensation 64 spiral 120 140 on NA 0.85 12 0.6 1.0 13.1 Definition 64 spiral 120 180 on 0.6 1.0 9.8 semi 0.85 16 Go Top 64 spiral Sn 130 501 on on 110 0.55 64 0.6 1.0 1.9 Drive 128 spiral 120 126 on 1.0 9.8 semi 0.85 16 0.6 Force 192 spiral 130 114 on on 0.85 64 0.6 1.0 2.5 Recon
Name of Series Kernel Window IR
Thick Interval Lvl Direction AX RIGHT Hr69 inner ear 3 feet/head 0.75 / 0.6 0.75 / 0.6 COR RIGHT Hr69 inner ear 3 front/back 0.75 / 0.6 0.75 / 0.6 AX LEFT 0.75 / 0.6 0.75 / 0.6 Hr69 inner ear 3 feet/head COR LEFT 0.75 / 0.6 0.75 / 0.6 Hr69 inner ear 3 front/back AX FULL Bf32 abdomen 3 feet/head 0.75 / 0.6 0.75 / 0.6 Send the above recons on the pre contrast scan (if without only) or on the post contrast scan (if IV given). Send only the following recon on the pre contrast scan (if without and with). AX FULL PRE Bf32 abdomen 3 feet/head 0.75 / 0.6 0.75 / 0.6 Add the following recons if indication is dehiscence of the superior semicircular canal or asked for by Rad. STENVER RIGHT Hr69 inner ear 3 front/back 0.75 / 0.6 0.75 / 0.6 POSCHL RIGHT Hr69 inner ear 3 left/right 0.75 / 0.6 0.75 / 0.6 STENVER LEFT Hr69 inner ear 3 front/back 0.75 / 0.6 0.75 / 0.6 POSCHL LEFT Hr69 inner ear 3 left/right 0.75 / 0.6 0.75 / 0.6
Care
Scan
Mode kV mAs Care
Dose kV & Lvl Pitch Acq Coll Rot Time Time Sensation 16 spiral 120 120 on NA 0.55 16 0.75 1.0 6.1 Go Up 32 spiral on 110 0.55 32 0.7 Sn 130 316 on 1.0 3.2 Sensation 64 spiral 120 140 on NA 0.85 12 0.6 1.0 13.1 Definition 64 spiral 120 180 on 0.6 1.0 9.8 semi 0.85 16 Go Top 64 spiral Sn 130 501 on on 110 0.55 64 0.6 1.0 1.9 Drive 128 spiral 120 126 on 1.0 9.8 semi 0.85 16 0.6 Force 192 spiral 130 114 on on 0.85 64 0.6 1.0 2.5 Recon
Name of Series Kernel Window IR
Thick Interval Lvl Direction AX RIGHT Hr69 inner ear 3 feet/head 0.75 / 0.6 0.75 / 0.6 COR RIGHT Hr69 inner ear 3 front/back 0.75 / 0.6 0.75 / 0.6 AX LEFT 0.75 / 0.6 0.75 / 0.6 Hr69 inner ear 3 feet/head COR LEFT 0.75 / 0.6 0.75 / 0.6 Hr69 inner ear 3 front/back AX FULL Bf32 abdomen 3 feet/head 0.75 / 0.6 0.75 / 0.6 Send the above recons on the pre contrast scan (if without only) or on the post contrast scan (if IV given). Send only the following recon on the pre contrast scan (if without and with). AX FULL PRE Bf32 abdomen 3 feet/head 0.75 / 0.6 0.75 / 0.6 Add the following recons if indication is dehiscence of the superior semicircular canal or asked for by Rad. STENVER RIGHT Hr69 inner ear 3 front/back 0.75 / 0.6 0.75 / 0.6 POSCHL RIGHT Hr69 inner ear 3 left/right 0.75 / 0.6 0.75 / 0.6 STENVER LEFT Hr69 inner ear 3 front/back 0.75 / 0.6 0.75 / 0.6 POSCHL LEFT Hr69 inner ear 3 left/right 0.75 / 0.6 0.75 / 0.6
Pagina 3 — text în engleză
CT IACs (Temporal Bones / Mastoids) GE PARAMETERS & RECONS Scan
Smart
Slice
Beam
Rot
Dose
Type SFOV kV mA
Range Noise
Index mA Thick Coll Pitch Speed Time Red ASIR Scan
Time LS 16 helical head 120 80-350 0.531 10.62 8.00 on 0.625 10 0.8 NA NA 3.0 Opt 540 helical head 120 80-350 8.00 on 0.625 10 0.531 10.62 0.8 NA NA 3.0 LS VCT 64 helical head 120 80-350 8.00 on 0.625 20 0.531 10.62 0.5 20 20 1.9 Disc VCT 64 helical head 120 80-350 8.00 on 0.625 20 0.531 10.62 0.5 NA NA 1.9 Window
Recon Name of Series Thickness Interval Recon
Algorithm Width/Level Direction AX RIGHT 0.625 0.625 bone plus full 2500/480 feet/head Must be first recon. COR RIGHT 0.625 0.625 bone plus full 2500/480 front/back AX LEFT 0.625 0.625 bone plus full 2500/480 feet/head COR LEFT 0.625 0.625 bone plus full 2500/480 front/back AX FULL 0.625 0.625 std full 400/40 feet/head Send the above recons on the pre contrast scan (if without only) or on the post contrast scan (if IV given). Send only the following recon on the pre contrast scan (if without and with). AX FULL PRE 0.625 0.625 std full 400/40 feet/head Add the following recons if indication is dehiscence of the superior semicircular canal or asked for by Rad. STENVER RIGHT 0.625 0.625 bone plus full 2500/480 front/back POSCHL RIGHT 0.625 0.625 bone plus full 2500/480 left/right STENVER LEFT 0.625 0.625 bone plus full 2500/480 front/back POSCHL LEFT 0.625 0.625 bone plus full left/right 2500/480
Smart
Slice
Beam
Rot
Dose
Type SFOV kV mA
Range Noise
Index mA Thick Coll Pitch Speed Time Red ASIR Scan
Time LS 16 helical head 120 80-350 0.531 10.62 8.00 on 0.625 10 0.8 NA NA 3.0 Opt 540 helical head 120 80-350 8.00 on 0.625 10 0.531 10.62 0.8 NA NA 3.0 LS VCT 64 helical head 120 80-350 8.00 on 0.625 20 0.531 10.62 0.5 20 20 1.9 Disc VCT 64 helical head 120 80-350 8.00 on 0.625 20 0.531 10.62 0.5 NA NA 1.9 Window
Recon Name of Series Thickness Interval Recon
Algorithm Width/Level Direction AX RIGHT 0.625 0.625 bone plus full 2500/480 feet/head Must be first recon. COR RIGHT 0.625 0.625 bone plus full 2500/480 front/back AX LEFT 0.625 0.625 bone plus full 2500/480 feet/head COR LEFT 0.625 0.625 bone plus full 2500/480 front/back AX FULL 0.625 0.625 std full 400/40 feet/head Send the above recons on the pre contrast scan (if without only) or on the post contrast scan (if IV given). Send only the following recon on the pre contrast scan (if without and with). AX FULL PRE 0.625 0.625 std full 400/40 feet/head Add the following recons if indication is dehiscence of the superior semicircular canal or asked for by Rad. STENVER RIGHT 0.625 0.625 bone plus full 2500/480 front/back POSCHL RIGHT 0.625 0.625 bone plus full 2500/480 left/right STENVER LEFT 0.625 0.625 bone plus full 2500/480 front/back POSCHL LEFT 0.625 0.625 bone plus full left/right 2500/480
Pagina 4 — text în engleză
CT IACs (Temporal Bones / Mastoids) PHILIPS PARAMETERS & RECONS Scan
Dose
3D
Rot Scan
Mode kV Avg
mAs Index Dose Pitch Detect Colli Time Time 0.50 2.5 Incisive 128 helical 120 350 NA off 0.40 32 0.625 Name of Series Thick Interval Filter Window iDose Recon
Direction AX RIGHT 0.8 0.8 YC IAC 1 feet/head COR RIGHT 0.8 0.8 YC IAC 1 front/back AX LEFT 0.8 0.8 YC IAC 1 feet/head YC IAC 1 COR LEFT 0.8 0.8 front/back AX FULL 0.8 0.8 UB abdomen 1 feet/head Send the above recons on the pre contrast scan (if without only) or on the post contrast scan (if IV given). Send only the following recon on the pre contrast scan (if without and with). AX FULL PRE 0.8 0.8 UB abdomen 1 feet/head Add the following recons if indication is dehiscence of the superior semicircular canal or asked for by Rad. STENVER RIGHT 0.8 0.8 YC IAC 1 front/back POSCHL RIGHT 0.8 0.8 YC IAC 1 left/right STENVER LEFT 0.8 0.8 YC IAC 1 front/back POSCHL LEFT 0.8 0.8 YC IAC 1 left/right
Dose
3D
Rot Scan
Mode kV Avg
mAs Index Dose Pitch Detect Colli Time Time 0.50 2.5 Incisive 128 helical 120 350 NA off 0.40 32 0.625 Name of Series Thick Interval Filter Window iDose Recon
Direction AX RIGHT 0.8 0.8 YC IAC 1 feet/head COR RIGHT 0.8 0.8 YC IAC 1 front/back AX LEFT 0.8 0.8 YC IAC 1 feet/head YC IAC 1 COR LEFT 0.8 0.8 front/back AX FULL 0.8 0.8 UB abdomen 1 feet/head Send the above recons on the pre contrast scan (if without only) or on the post contrast scan (if IV given). Send only the following recon on the pre contrast scan (if without and with). AX FULL PRE 0.8 0.8 UB abdomen 1 feet/head Add the following recons if indication is dehiscence of the superior semicircular canal or asked for by Rad. STENVER RIGHT 0.8 0.8 YC IAC 1 front/back POSCHL RIGHT 0.8 0.8 YC IAC 1 left/right STENVER LEFT 0.8 0.8 YC IAC 1 front/back POSCHL LEFT 0.8 0.8 YC IAC 1 left/right